I have three hens and a duck, all about 4 months old. They have great nest boxes filled with straw in their coop. I have noticed two combs turning a darker red, but no squatting. Today I went to our shed to get new straw when cleaning out the coop. They had pulled apart bails of straw and there were three huge nests! Not sure who is responsible, I have never seen them near the shed. Our chickens free range on 5 acres, though they usually stay pretty close. Now I'm worried they are going to start laying somewhere other than the coop and I'll never find the eggs. Should I try to move the massive nests into the coop? Would a duck make multiple nests or are the chickens likely responsible too?